Maintains the client-side context for development with a Project Web App instance, and contains the enterprise-wide collections of Project Server objects that exist in Project Web App.
Assembly: Microsoft.ProjectServer.Client (in Microsoft.ProjectServer.Client.dll)
Because the ProjectContext object inherits from ClientContext in SharePoint, you can also access the SharePoint CSOM through the ProjectContext object. It is not necessary to instantiate a ProjectServer object, which the client-side code uses internally.
An advantage of the ProjectContext class is that it includes the WaitForQueue method. If you used the ProjectServer class, you would have to develop your own routines to wait for a queue job to complete.
For more information about the ProjectContext class, see Getting started with the Project Server CSOM and .NET. For code examples, see WaitForQueue(QueueJob, Int32) and Projects.